NOCOMMIT: Blink tracing now uses base

third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp

Index: third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
index a62cb6a937df12a7209905da2f0158061672c426..39ffc2ac21f839488ea2b7d3acdfb8db86a9672a 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
+++ b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
@@ -246,11 +246,11 @@ void ResourceFetcher::requestLoadStarted(Resource* resource, const FetchRequest&
     m_validatedURLs.add(request.resourceRequest().url());
 }
 
-static PassRefPtr<TraceEvent::ConvertableToTraceFormat> urlForTraceEvent(const KURL& url)
+static scoped_refptr<base::trace_event::ConvertableToTraceFormat> urlForTraceEvent(const KURL& url)
 {
-    RefPtr<TracedValue> value = TracedValue::create();
+    scoped_refptr<TracedValue> value = TracedValue::create();
     value->setString("url", url.string());
-    return value.release();
+    return value;
 }
 
 void ResourceFetcher::preCacheData(const FetchRequest& request, const ResourceFactory& factory, const SubstituteData& substituteData)